Association of Psoriasis With Thyroid Disorders: A Hospital-Based, Cross-Sectional Study

Background Although numerous studies have been conducted to determine the relationship between psoriasis and thyroid dysfunction, contrasting results have been reported. The link between psoriasis and thyroid disease has not been elucidated well. This study aimed to determine the frequency of thyroid dysfunction and its relationship with gender, age, duration, and severity of psoriasis among patients with psoriasis. Methodology Psoriasis was diagnosed clinically, and the severity of the disease was assessed by the Psoriasis Area Severity Index (PASI) score and the body surface area (BSA) involved, as measured by Wallace's rule of nine. A total of 111 patients with psoriasis were analyzed for thyroid dysfunction, which included thyroid-stimulating hormone, free T3, free T4, and anti-thyroid peroxidase (anti-TPO) antibody levels. SPSS version 23.0 (IBM Corp., Armonk, NY, USA) was used for analysis. Results Out of the 111 analyzed psoriasis patients, deranged thyroid status was observed in 22 patients. Anti-TPO was increased in 19 patients. Patients with thyroid dysfunction had a more severe form of psoriasis (both by PASI score and BSA involvement) than those with mild psoriasis (61.9% vs. 38.1%), whereas patients with increased anti-TPO had a milder disease. Conclusions This study illustrated deranged thyroid status and thyroid autoimmunity in 19.8% and 17.1% of psoriasis patients, respectively, suggesting thyroid dysfunction and autoimmunity. However, further studies are required to expand our knowledge of psoriasis and its association with thyroid dysfunction and thyroid autoimmunity, as well as with age, gender, disease duration, and severity of psoriasis.